Testing for a Short to Voltage

Special Tools EL-39200-B Digital Multimeter (DMM) For equivalent regional tools, refer to Special Tools. Danger: This procedure should not be performed on high voltage circuits. Performing this procedure on high voltage circuits may result in serious injury or death.

Caution

Refer to Test Probe Caution. The following procedure tests for a short to voltage in a circuit.

1. Remove the power feed (i.e. fuse, control module) from the suspect circuit.
2. Disconnect the load.
3. Set the digital multimeter (DMM) to the V (DC) position.
4. Connect the positive lead of the DMM to one end of the circuit to be tested.
5. Connect the negative lead of the DMM to a good ground.
6. Switch the vehicle power mode to Vehicle in Service Mode and operate all accessories.
7. If the voltage measured is greater than 1 V, there is a short to voltage in the circuit.